Question: Which free video game has the highest amount of players?
Paraphrase: What free game has the most players?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q21125433 . ?ent wdt:P1873 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: OpenTTD, Freeciv, OpenRA, Soldat, Teeworlds